| abstract |
An additive for imparting anti-wear properties to a lubricating composition is based on a combination of (1) an organoborate ester composition and (2) one or more sulfur or phosphorus-containing compounds or a sulfur-free molybdenum compound. The sulfur or phosphorus-containing compounds are dithiocarbamate, bisdithiocarbamate, 1,3,4-dithiazole, phosphodithioate, phosphorodithioate esters and the molybdenum compound is prepared by reacting (a) about 1.0 moles of fatty acid having 12 or more atoms of carbon, (b) from about 1.0 to 2.5 moles of diethanolamine and (c) a source of molybdenum. |